Adsorption of Methylene Blue on Montmorillonite |
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Authors: | Guangming Chen Jingjun Pan Busing Han Haike Yan |
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Institution: | The Chinese Academy of Sciences , Institute of Chemistry , Beijing, 100080, People's Republic of China |
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Abstract: | ABSTRACT Adsorption of Methylene Blue ( MB) on Na-, Fe- and Al-montmorillonite suspensions at 298.15 K were studied. The effect of different exchangeable cation on the adsorption amount of MB was determined. The results show that methylene blue cations( MB+ ) replace Na? more easily than they do Fe3+ and Al3 + The adsorption isotherms on the three montraorillonites were all of Langmuir type, except that the isouHerm of MB on Na-montmorillonite presents nonmonotonic curve at low surface coverage. The specific surface areas in suspension were calculated by( MB 3 + )method, and Na? is more effective to determine the specific surface area by MB method in suspension than Fe3 + and A3 + The discrepancy of the specific surface area measured by MB and BET method was discussed. |
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Keywords: | Methylene Blue Na- Fe- and Al-montmorillonite Adsorption isotherm Specific surface area |
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